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Die Bestimmung der Bildungsenthalpien von in thermischen Zersetzungsreaktionen auftretenden Verbindungen durch Einwurfkalorimetrie — Bildungsenthalpie AlCl3 · 6 H2O, amorph-Al2O3, γ-Al2O3, Al2O3 · 2 H2O · 2 HCl

Research paper by R. Naumann, D. Petzold

Indexed on: 01 Apr '81Published on: 01 Apr '81Published in: Journal of Thermal Analysis and Calorimetry



Abstract

The heats of formation of stable compounds produced during thermal decomposition reactions were determined by measurements of enthalpies of reactions. The investigations were performed by using a heat-flow dropping calorimeter. The validity of the method was confirmed by measurement of the heat of formation of calcium carbonate. All calorimetric results had an accuracy of ± 2 %. The heats of formation under standard conditions,δbH298⊝kJ mol−1, for AlCl3 · 6 H2O, amorphous Al2O3, γ-Al2O3 and Al2O3 · 2 H2O · 2 Hcl are −2667±8, −1625±39, −1654±39, and −2626 ± 4, respectively.